Syntax highlighting not working
Please take a look at https://github.com/CIRANDAS/noosfero-ecosol/blob/master/plugins/delivery/views/delivery_plugin/admin_method/_edit.html.slim
Only elements are being highlighted.
Reported on https://github.com/github/linguist/issues/2467
This issue is fixed in Slim 2.0.
Slim 2.0 for ST4 has been released at Package Control, with source moved to https://github.com/SublimeText/Slim.
Ruby syntax itself may require some tweaks, but Slim handles everything fine on its end.

@deathaxe I'm trying to get this package integrated into linguist (see the issue mentioned above) to address the syntax not working, but I get the following error when attempting to do that.
Any idea why it would say it couldn't find a grammar?
@deathaxe Is this something that could be added so we have have nice formatting on GitHub?
The referenced Slim 2.0 syntax is a Sublime Text specific syntax definition which does not work with linguist or TextMate.
I believe the original issue was created because syntax highlighting is not working in the GitHub interface. GitHub's interface uses linguist which relies on TextMate grammar. Linguist is currently pointing to this repository for it's grammar.
This issue is fixed in Slim 2.0 The referenced Slim 2.0 syntax is a Sublime Text specific syntax definition which does not work with linguist or TextMate.
The repository you linked to fixes the grammar but only for the SublimeText editor which means it does not solve this issue. Am I understanding that correctly or did I miss something?
@fredwu Are there plans to bring this repository up to date and active or is it no longer maintained?
According to README this repo primarily targets TextMate and Sublime Text, regardless anyone else such as linguist using it. According to the age of last commit and the rather low activity the ST specific fork was created to continue maintanance for ST ecosystem. I wouldn't bed on any progress here.
@Jeremy-Walton I don't believe anyone's actively working on this, I haven't been using Slim or Textmate or Sublime for a few years. Would be happy to hand this project over to someone who's interested in maintaining it.
I actively use Slim, but do not use Textmate or Sublime, nor do I know much about TextMate grammar. I did find https://github.com/borama/vscode-ruby-slim which has a Textmate compatible grammar so I am attempting to update linguist to use it
here's my VSCode extension to help with authoring TextMate grammars https://marketplace.visualstudio.com/items?itemName=RedCMD.tmlanguage-syntax-highlighter
Since this is no longer actively worked on, Linguist replaced its grammar library here https://github.com/github-linguist/linguist/pull/7465 and was released yesterday in https://github.com/github-linguist/linguist/releases/tag/v9.3.0
Seems like this can be closed now.